Electronic Brake Control Module

The Electronic Brake Control Module (EBCM) is a small control computer, mounted under the dash to the left of the steering column, which monitors the speed of each wheel as well as several functions internal to the hydraulic unit. The primary functions of the EBCM are to detect wheel locking tendencies, control the brake system while in anti-lock mode and monitor the system for proper operation. The EBCM also controls display of ABS diagnostic trouble codes while in diagnostic mode.

The EBCM continuously checks the speed of each wheel to determine if any wheel is beginning to lock. If a wheel locking tendency is detected, the EBCM commands appropriate valve positions to modulate brake fluid pressure in some or all of the hydraulic circuits to prevent wheel lock-up and provide optimum braking. The EBCM continues to control pressure in individual hydraulic circuits until a locking tendency is no longer present.

ABS is constantly monitored by the EBCM for proper operation. If the EBCM detects an error, it can disable the anti-lock function and/or turn on the Red BRAKE warning indicator lamp in the Instrument Panel Cluster (IPC).

The EBCM also has a self-diagnostic capability, including 16 trouble codes, which may be used in the event of a system malfunction. The EBCM can be requested to display these trouble codes (if any are present) by entering ABS diagnostic mode.